Optical pickup apparatus and information recording/reproduction apparatus
a technology of information recording/reproduction and optical pickup, which is applied in the direction of data recording, optical recording heads, instruments, etc., can solve the problems of increased production cost of optical pickup apparatus, complicated adjustment of filter position b>8/b>, and detection signal, etc., and achieve the effect of suppressing errors
Inactive Publication Date: 2007-12-13
SHARP KK
View PDF5 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0021]It is an object of the invention to provide an optical pickup apparatus that can reduce flare light generated by an objective lens and reduce stray light, and an information recording / reproduction apparatus.
Problems solved by technology
More specifically, when reproducing a high-density optical disk, reproduction is performed using the whole aperture of the objective lens, and when reproducing an optical disk with a base material having a thickness of 1.2 mm, aperture limitation is performed by moving the movable aperture-limiting plate into a light beam such that the light is focused optimally for reproducing the optical disk.
Thus, the production cost of the optical pickup apparatus is increased, and adjustment of the position of the filter 8 is complicated.
Furthermore, a light beam emitted from the semiconductor laser device is reflected by one surface of the filter 8 on the side of the erecting mirror 2 and enters a photodetector (not shown) as stray light other than signal light, and thus an error is caused in a detection signal for reading and recording information from / onto the optical recording medium.
Thus, an error is caused in a detection signal for reading and recording information from / onto the optical recording medium.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0062]Now referring to the drawings, preferred embodiments of the invention are described below.
[0063]Hereinafter, a plurality of embodiments of the invention are described. In the following description, a component corresponding to an already described component may be denoted by the same reference number and the description thereof may not be repeated. In a case where only a portion of a component is described, the other portions of the component are the same as those that have been already described.
[0064]FIG. 1 is a view showing the configuration of an optical pickup apparatus 10 according to one embodiment of the invention. The optical pickup apparatus 10 irradiates an optical disk recording medium (hereinafter, simply referred to as an “optical recording medium”) 18 such as a compact disk (abbreviated as a “CD”) and a digital versatile disk (abbreviated as a “DVD”) with a light beam, thereby performing at least either one of a process of reading information of the optical reco...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
An optical pickup apparatus and an information recording / reproduction apparatus that can reduce flare light generated by an objective lens and reduce stray light are provided. An erecting mirror is provided on an optical path between a light source and an objective lens. An incident face on the erecting mirror is provided with a wavelength selective film having a first region that reflects a light beam having a first wavelength emitted from a first semiconductor laser device and that transmits a light beam having a second wavelength emitted from a second semiconductor laser device, and a second region that reflects light beams emitted from the first and the second semiconductor laser devices.
Description
CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to Japanese Patent Application No. 2006-159103, which was filed on Jun. 7, 2006 the contents of which, are incorporated herein by reference, in their entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an optical pickup apparatus that is preferably used when at least either a reading process of information recoded in an optical recording medium or a recording process of information onto the optical recording medium is performed, and an information recording / reproduction apparatus.[0004]2. Description of the Related Art[0005]Optical pickup apparatuses are used for reading and recording information from / onto optical disk recording media (hereinafter, simply referred to as “optical recording media”) such as compact disks (abbreviated as “CDs”) and digital versatile disks (abbreviated as “DVDs”). The optical pickup apparatuses read and record information fro...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G11B7/00
CPCG11B7/139G11B7/1362
InventorYANO, TAIICHIRO
OwnerSHARP KK